<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			input:checked ~ button {
    background-color: #69C;
}
		</style>
	</head>
	<body>
		 <input type="checkbox" checked="checked"/>
	   	  <button>提交</button>
	</body>
</html>
